Shock-preventing device for vehicles



May 17 i 1921.

E. cANToNo SHOCKJPREVENTING DEYIE 'FOR VEHICLES Fileduulyv. 1925 y s sheets-5115er? y E. cAN'roNo y SHGCK PREVENTING DEVICE FOR VEHICLES Filed July '7. 1925 3 Sheets-Sheet 3 57 mM/u VM Patented May 17, 1927.

EUGENIO CANTONO, OF ROME, ITALY.

SHCK-PREVENTING DEVICE "FR, VEHICLES.

Appncanonmea Julyr, 1325, serial In Aevery semifelliptic suspension `device for vehicles -it happensathat theseii'ii-elliptic supports the vehicle dilierently relative V,to the axle, owing to variations of road, moving towards or from .theifranie'of the vehicle. These variations of the supporting-effort produce shocks.

In order=to cushion'or brake these shocks them from being'produc-ed, with the result--v thatfpersons riding onuneven street-sidonot receive f shocks.

According to invention between the semi-ellipsed springs andsthe 'trame of `the vehicle a spring and lever device is inserted which produces y,between the .axle and the frame a supporting vforce which, contrarily .to the eiect of semi-ellipsed springs, Vis increased `:as .the axle .moves away from the frame, Aanddecreases asthe axle moves towards the frame. Thisrnewdeviceis so calculated that to every decrease of the sup- ,porting force of the C-springs corresponds an increase of lthe supporting orceof .the spring and lever device, and vice vversa to every increase of the supporting force ofthe C-springs corresponds. a decreaseot'thesupporting force of the spring andlever device, so that -the vehicle tis -automatically supported by a "force whichis'not varied by the unevenness of the road, and therefore is not subjected to shocks generated by the said unevenness.

In order that my invention may be more clearly understood I am now going to described same with the aid of the annexed drawings in which- Fig. l is a. side view of my device in eX- panded condition with the vehicle wheel entering in aI depression -of the road,v

Fig. 2 is a similar view of same in normal N0. 42,077,fan't1.in lftaly Julyi29, l1924.

condition, with ftlie vehicle ruiming :on even 55 road, and Figs. 3 and 4 corresponding viewsloa modification offthesameinvention. c .Figure 5 is a perspective :View got .the springand lever arrangement shown in Figs. 'and; l

Fig'G 'isa detail yviewrotithe coil-spring used in conjunction with ,the levers.

In -the said Figures l :and 2 AfA-isla double leverpivoted at IB l*to the frame-ot the vehicle, `whilst at tliemeetingtpoint offits two arms the lever is :pivoted yto .a double lever C-C pivotally ymounted at D .on the axle of the vehicle. y

The free ends of the said Alevers AfAl and C--C are connected itoge'theribyncoil springE which 'by expansion tends to rotate said levers on theircommon gpivot O ,thus tending to increase thespacerbetween the :pivots YB and Dfapart thereby opposing their moving towards each other i under tlie weight of thel vehicle-acting in-,opposite-di-- rection to kthat of coilspringE.,

From Fig. yl itis seen fthatrmoment arm X of springE with respect .topivot Oghasfa length approximately equal `to the moment arm Yvof theuweight ofthe vehicle withzrespect to said pivot O. It therefor ,a sup-1 porting force betweenBand D, thatis'between axle and frame, is;tobeprodi1ced,fsuch l as .forinstancelQOO kg. in addition to the suspending torce of the laminated springs when the ywheel drops 'into L a hole `ori cavity of the road iffsuch is the Vtorce ,they have .,lost, it will be suliicient -to insert 'between points Fand ,Gla coil-springtending yto expand with -a force-of 200kg., as the acting arms offorcein play are equal.

Itwillbe seen from Fig. 2 that on .the one hand the compression Vof coil spring E is slightly increasedybut on the other hand'its moment arm ot action X is greatly decreased, and vice versa the moment-arm of action Y of the weight .of the vehicle with respect to the common pivot O of levers A and C is greatly increased. v

Owing to this the increase of compression of coil spring E not only becomes absolutely insufficient for producing between B -and D, that is between axle and frame, the above said force of 200 kg., but it only produces a force equal to the ratio Tof the lever arms multiplied with the force of the coil spring.

In compensation, in the said position, the semi-elliptic springs exert an increased supporting effect which being flattened by the axle moving towards the frame of the wheel leaving the depression of the road and produce a reaction sufficient for supporting the' weight. of the vehicle and need decreased assistance from the levers.

In Figs. 3 and l a modification is shown for cases in which the available space between the vehicle springs and the frame -is small.

According to this modification the double lever arm or bell-crank lever A described with reference to Figsfl and 2 is pivoted at the end D to the axle and at O to simple arm C pivoted to the frame at B while, the other lever A insteadof being pivoted to the end F of the case containing the coil spring E is pivoted to a point F near 'the said end, so that the said spring case by' being more or less extended beyond the pivot may allow of a longer coil spring being used than that which would be allowed by the length of the single arm A such as in Figs. 1 and 2.

Owing to the said modification longer coil springs may `be used than those allowed by the length of arm A, and therefore less sensitive springs may be used as regards the said force produced with respect to the an-V of the lever arms only, there- Y by always becoming more rapid, so that the variations of the supporting force occurring in the vehicle springs M may be more rapidly compensated, the said Avariations being produced very rapidly also by very slight movements of the axle.y

VHaving now` particularly described and ascertained my said invention and the inanthe ratio ner in which the same is to be performed, what Il claim and desire to secure by Letters Patent is:

l; In a shock preventing device for vehicles in combination with a laminated spring, a frame, a pair of levers arranged between 'said spring and said frame, one of said levers being pivoted at one end to the frame, the other o:t` said levers being pivoted to the laminated spring and to said first lever, spring means combined with said pair of levers and adapted to resiliently spread the two levers against approaching movements of the frame and the laminated sprinff.

2. In a shock preventing device for vehicles in combination with a frame, a semielliptical laminated spring, a pair of angle levers arranged between said spring and said frame, one of the levers being pivoted at one end to the frame, while the other angle lever is pivoted intermediate its ends to the semi-elliptical spring and one end pivoted to an intermediate point of the other angular lever, and a coiled spring'connecting the tree ends of Athe two levers and adapted to spread the other ends of the lever againstJ the approaching movement o the laminated spring yand frame.

3. In a shock preventing device in combination with a laminated semi-elliptical spring and chassis which is carried', by the spring, a pair of levers connected withsaid laminated spring and said chassis respectively, and with each other, one of said levers being a bell crank lever which is connected intermediate its ends with the free end of said other lever, one end of the bellA crank lever being connected with a spring adapted to counter-act the approaching movement or' the frame and spring'.

4. In a shock preventing device for vehicles, in combination, a semi-elliptical spring, a trame, a lever pivoted at one end to the frame and'at its other end to a cas-` signed my name. t

EUGENIO CANTNO. 

